Steam-boiler fire-box.



PATENTED JAN. 30, 1906.

0. w. HULLINGS. STEAM BOILER FIRE BOX.

APPLICATION FILED JUNE 24, 1905.

2 $HEETS-SHEET l.

PATENTED JAN. 30, 1906.

C. W. HULLINGS. STEAM BOILER FIRE BOX.

APPLICATION FILED JUNE 24, 1905.

2 SHEETS-SHEET 2.

C. m J6 wax-n firm new UNI E STATES PATENT OFFICE.

(JHARLESW. HULLINGS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALFTO JESSE W. THATCHER, OF PHILADELPHIA, PENN SYL- VANIA,

STEAM-BQILER FIRE-BOX.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed J 11116 24, 1905. Serial No. 266,905.

Boiler Fire-Boxes; and I declare the foll'owing to be a full, clear, andexact description of the same, such as will enable others skilled in theart to which it appertains to make and use the invention, referencebeing had tothe accompanying drawings, andto letters of reference markedthereon, which form apart of this specification.

Figure 1 is a central longitudinal vertical section of my invention asapplied. Fig. 2 is a section on the line 2 2, Fig. 1; Fig. 3 is asectional detail view of the connection of baffler-plate and stay-tubes.Fig; 4 is a perspective detail view of a section of the baffler late. af i T e invention has relation to steam-boiler fire-boxes, andparticularly to improvements upon the devices shown in Letters PatentNo. 490,629 and No. 495,939; and the invention consists in the nlovelconstruction and combinations of parts, as hereinafter setforth.

The object, of the present invention is to make provision for moreperfect combustion in order to effect a reduction of cinder and carbonparticles in thefire-box and also to arrange for a better circulation ofthe boiling water.

- other by tenon-and-groove joints, ass own.- The bafiler-plate may beloose from the fire-' In the accompanying drawings, illustrat ing theinvention, the letter a desi nates the furnace or-fire-box, and b theboifer having extensions 0. Flues for the passage of the products ofcombustion to the stack are indicated at d; The doorway of the'fire-boxis shown at e, and f represents grate-bars.

The deflector is shown at g and is preferably/of transversely-archedform, located below the crown-sheet 7c .and extendin backward from thefront sheet of the e-box about two-thirds the length of said fire-box,-where it terminates in an upwardly-arched.

marginal portion. Under the back portion of the deflector is located thebaffler-plate m, which is also transversely arched in order that itshall have approximate arallel position to the deflector. The ba er 7plate may be made hollow and in sections engagin each cannot escapetheir effective action.

.box walls atits ends and may be held in position by means ofsecuring-flanges p at the back fire-box sheet and by means of uprightstay tubes s to the crown-sheet, as shown. The stay-tubes are designedto promote circulation of the boiler-water through the baffier-platetubes'and boiler extensions.

The baffler-plate extends under theback of the deflector and past itsmarginal end such wise as to provide the passage or throat t, which isof transversely-arched or approximately arched form. This passa e, lyingbetween the concave bottom of t e deflector and the convex top of thebaffler-platefls of arched form and ofiapproximately equal verticaldepth at the sides as well as in its middle portion. This passage 25 isofcom parati'vely small depth with relation to its transverse extent andhas for its top the back portion ofthe deflector and for its bottom thefront portion of the baiiier-plate.

The hollow sections of the baifler-plate,

maybe strengthened by means of the colu'mns' (u... The walls of thebaflier-plate in front and rear are provided with apertures for thepipes r and p, which form means of communication with theextension-chambers of the boiler.

" All the products "of combustion are designed to ass through thetransverse passage t, in a 1 parts of which saidproducts, includingcinder-s and unburned particles of carbon, are subjected to intenseheat, whereby theyare desi nod to be thoroughly consumed, so that dieproducts of combustion passing through the flues, d to the stack arerelieved of such cinders and carbon particles and are reducedpractically to the condition of gas and vapor. The arallel or aproximate parallelism of the eflector to t e baf- -fier-plate is. des'nod to provide a passage wherein the dra tends to concentrate the flamesandheat in an-equalized manner at all points from side to side, so thatthe cinders In the patents hereinbefore referred to the lateral portionsof the passage are of large capacity com ared with the middle portionand tend to a low the cinders to pass unconsumed to the stack.

The circulation of water from the boiler'in and through thebaffler-plate is designed to be eflicient because of the hollowstay-pipes leading to the boiler extension above the crown-sheet, andproper bracing and support oi the bafHer-plate is secured by these ipes;which because of the water circ ating through them are conditioned towithstand the great heat of throat t. v

Having described the invention, what I the flames in the passage orclaim, and desireto secure byLetters Patent,

i specified.

under the back portion of the deflector,

whereby a transversely-e ualized passa e is formed between suchdeflector and ba erplate, substantially as specified.

2. In a boiler fire-boX, the combination with a transversely-archeddeflector extending backward from the front wall of the firebox, of aforward-extending transverselyarched baffler-plate, extending from theback wall of the fire-box under the back portion of the deflector andparallel thereto, to form a combustion-passage, substantially asspecified.

3. In a boiler fire-box, the combination with a deflector extending fromthe front wall of the fire-box, of a hollow baflEler-plate ara'llel tosaid deflector; and upright circuating-pipes connectingyand supportingthe bafller-plat'e in position,' substantially as 4-. In a boilerfire-box,the combination with a deflector extending from the front wallof the fire-box, of a haiflerplate extending from the rear wall of thefire-box beyond the end of said deflector and parallel thereto both inlongitudinal and in transverse relation, whereby is provided, betweensaid deflector and bafllenplate a flame-passage of approximatelyequalized draft from side to side, substantially as specified.

In-testimony whereof I afiix my signature in presence of two witnesses.

CHARLES W. HULLIN GS.

Witnesses:

H S. KAESTNER, CHAs. F. WALTER.

